Yasui T

Uterine adenosarcoma is a rare, low-grade malignant tumor that usually arises from the endometrium and presents as a large polypoid mass occupying the endometrial cavity. A correct histopathological diagnosis of adenosarcoma from a small sp…

OBJECTIVES: Pelvic organ prolapse (POP) is a significant health-care problem for older women. We have treated POP surgically using laparoscopic sacrocolpopexy (LSC) or robotic-assisted sacrocolpopexy (RSC). The original LSC and RSC procedur…

Menstrual and menstrual-related symptoms can significantly impact an individual's physical and psychological health. Understanding how these symptoms evolve over time is crucial to provide appropriate support and healthcare services to youn…

Low-grade endometrial stromal sarcoma (LGESS) is a rare uterine tumor, accounting for <1% of all uterine cancer cases. LGESS has several variations and the frequency of tumors exhibiting smooth muscle differentiation is 10-30% of LGESS case…

Uterine metastases from breast cancer are uncommon and have rarely been reported in the previous literature. The present report describes the case of a 66-year-old female who developed uterine metastasis 23 years following the primary treat…

PURPOSE: Although the validity of self-reported osteoporosis is often questioned, validation studies are lacking. This study was performed to investigate how well self-reported diagnoses of osteoporosis agreed with validated clinical inform…

OBJECTIVE: To classify diseases based on age at peak incidence to identify risk factors for later disease in women's life course. DESIGN: A cross-sectional baseline survey of participants in the Japan Nurses' Health Study. SETTING: A nati…

BACKGROUND: The prevalence and risk factors for endometriosis may differ according to diagnosis methodologies, such as study populations and diagnostic accuracy. We examined risk profiles in imaging-diagnosed endometriosis with and without …

PURPOSE: We evaluated the role of tumor necrosis factor alpha (TNFα) in rat ovulation and granulosa cell death of ovarian follicles during the periovulatory stage. METHODS: Immature rats primed with pregnant mare serum gonadotropin were in…

Endometriosis is a chronic gynaecological disorder that is accompanied by inflammation and oxidative stress. Atherosclerosis has a long subclinical progression in arteries of children and young adults decades before overt clinical manifesta…

OBJECTIVE: The influence of past history of infertility, which is closely associated with reproductive factors, on menopause has not been clarified. The purpose of this study was to clarify the association of reproductive factors, including…

PURPOSE: The aim of this study was to clarify the role of blood in the early stage of development of endometriotic lesions by developing a syngeneic transplantation model using immunocompetent mice. METHODS: Endometriotic lesions were indu…

Progestogen is a very important steroid hormone which has roles of supporting pregnancy secreted from ovary and placenta. From 1930, a lot of progestogens are compounded for clinical use. Compounded progestogens have not only progesterone e…

A 54-year-old female was referred to us for a nodule under her umbilical region. The nodule had enlarged slowly and reached a size of 20 mm in diameter over the last 2 years. She had no symptoms and there was no oozing of blood or pain duri…

A novel cytokine termed osteoprotegerin (OPG) that is also called osteoclastogenesis-inhibitory factor, which inhibits osteoclast maturation and activity, was recently isolated. In order to determine the influence of estrogen deficiency on …

We performed a randomized controlled study to determine the efficacy of add-backed therapy by every-other-day administration of 0.625 mg conjugated equine estrogen (CEE) and 2.5 mg medroxyprogesterone acetate (MPA) on GnRH agonists (GnRH-a)…

To determine the influence of estrogen on the activity of renal proximal tubular reabsorption of inorganic phosphate (Pi) in women, we examined the changes of the renal threshold phosphate concentration (also denoted as TmP/GFR), as well as…